Vacuum cleaner



FIG. 1 is a top, front and right side isometric view of a vacuum cleaner showing our new design;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof; and,

FIG. 5 is a top plan view thereof.

The bottom of the vacuum cleaner forms no part of the claimed design.

The broken lines show elements of the vacuum cleaner that form no part of the claimed design. 

CLAIM The ornamental design for a vacuum cleaner, as shown and described. 